PIC: Check Out Christina Aguilera's Growing Baby Bump!

Pregnancy is treating Christina Aguilera well! The singer has been keeping a fairly low profile during her current second pregnancy, but took to Twitter over the weekend to share a new photo of her baby bump.

In the pic, the 33-year-old leans sultrily against a wall, with her pregnant belly on full display in a tight blue tank top. “Happy 1st Day of Summer!” she wrote. “Keep those lips hydrated!”

Christina’s pregnancy was first reported back in February, when she became engaged to Matt Rutler, but she didn’t confirm the news herself until two months later. The former The Voice judge is already mom to 6-year-old Max from her previous marriage.